By Barry Santini, ABOMMonday, November 9, 2015 10:05 AM
With many variables to sort through in investigating a vision complaint, anything that could help to reduce the pool of possible suspects should be welcomed with open arms.

Ask just about any eye care professional when knowing the fitting vertex distance of a pair of glasses is important, and they'll no doubt respond: "For powers over 6 diopters, you'll have to compensate the power for the difference between the exam vertex distance and the wearing vertex distance."​​

By Barry Santini, ABOMMonday, October 26, 2015 10:00 AM
For most of the last century, eyeglasses were fabricated using a binocular measurement for pupillary distance, and simply dividing it in half to center the lenses for each eye. This method delivered apparently great patient satisfaction, as visual complaints were not clearly traceable to the lack of using a "proper" monocular PD....even for segmented multifocals.

By Darryl Meister, ABOM, Carl Zeiss VisionWednesday, May 1, 2013 2:50 PM
POW or "position of wear" is a term that is used to describe the way that an eyeglass frame positions lenses in front of the eye.

By Bob Hughbanks, ABOC, Expert Optics Inc. and Mark Mattison-ShupnickSunday, November 27, 2011 10:31 PM
To measure tilt and wrap the easy way i.e., before you can afford a digital measuring system, practice this method with a colleague in your office.